To provide a thermoplastic and/or melt-moldable material composition having optical properties about refractive index n and Abbe number ν meeting formulae (H) and (J), heat resistance ≥80°C in glass transition temperature, transparency ≥70% in light transmittance, and density of ≤2.0 g/cm3, and to provide an optical component constructed by including the above material composition. 1.45<n≤1.80...(H) ν≥205-100 n...(J).
This thermoplastic material composition has a refractive index n2 and Abbe number ν2 given by formulae (E), (F) and (G) and comprises a thermoplastic resin having specific physical properties and titanium-based oxide inorganic microparticles whose mean diameter di meets formula (C) and titanium content Ci is given by formula (D) 1 nm≤di≤200 nm...(C) 50 wt.%≤Ci≤59.5 wt.%...(D) 1.45<n2≤1.80...(E) ν2≥205-100 n2...(F) n2≥n1+0.01...(G).
HAYASHI TOYOJI
TAMAI MASAJI
